Question

Suppose that 2.00mL of 0.02 mol/L aqueous sodium sulphide, Na2S is used to test a 60.0mL sample of water containing 0.0004 mol/L mecury (II) nitrate Hg(NO3)2, ions.

a. Write the balanced equation
Hg(NO3)2 + Na2S = HgS + 2NaNO3

b. Determine the limiting reactant
Na2S = 2.00mL/1000mL x 0.02mol/L
= 0.00004 mol

Hg(NO3)2 = 60.0mL/1000mL x 0.0004mol
= 0.000024 mol

the limiting reactant is the mercury nitrate.

c. calculate the maximum mass of precipitate formed.

what is the precipitate?

Very confused with this question

Answers

Damon
Mercury sulfide
Chemical Compound
Mercury sulfide, mercuric sulfide, mercury sulphide, or mercury sulfide is a chemical compound composed of the chemical elements mercury and sulfur. It is represented by the chemical formula HgS.
"******It is virtually insoluble in water.*****"
Wikipedia
Formula: HgS
Molar mass: 232.66 g/mol
Density: 8.10 g/cm³
Melting point: 1,076°F (580°C)

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